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100 results about "Resultant" patented technology

In mathematics, the resultant of two polynomials is a polynomial expression of their coefficients, which is equal to zero if and only if the polynomials have a common root (possibly in a field extension), or, equivalently, a common factor (over their field of coefficients). In some older texts, the resultant is also called the eliminant.

Image processing involving correction of beam hardening

An image processing apparatus is provided for processing a plurality of sets of projection data acquired by radiating an X-ray onto an object in a multitude of directions. The apparatus has a correcting unit and a reconstructing unit. The correcting unit corrects the projection data with regard to beam hardening of the projection data. The beam hardening is caused due to a contrast agent injected into the object. For example, the correcting unit includes a correction table defining a correcting value to a change in densities of a region in which the contrast agent is present and corrects the projection data on the basis of the correcting value obtained from the correction table. The reconstructing unit reconstructs the corrected projection data into an image of the object. Thus, artifacts due to beam hardening resultant from use of the contrast agent can be avoided.
Owner:TOSHIBA MEDICAL SYST CORP

Reverse identity profiling system with alert function

The present invention is a universal biometric monitoring system designed to locate and track terrorists, criminals, and missing or displaced persons. Via various checkpoints and a plurality of identity verification or observation ports, defining identity characteristics or biometric data is transmitted to a system that cumulatively creates a database and identity related profiles. The uses of the system are three-fold. Data is retrieved and examined in order to: Find, isolate, and restrict wanted individuals; Locate missing children; Bring order and identity resolution to groups of individuals, most specifically individuals displaced resultant to disaster situations. The system is capable of retrieving, capturing, transmitting, analyzing, and otherwise examining biometric data, cumulatively building identity profiles, and has the ability to search, match, find, trace and track identities through this system as well as set off a multiplicity of alert outputs and alarms.
Owner:OKUN SHERI LEE

Feedforward parameter estimation for electric machines

A method and system for estimating a parameter of an electric machine, including a controller and a switching device, the controller responsive to at least one of: a current sensor, and a temperature sensor. Where the controller executes a parameter estimation process, which is responsive to at least one of: a current value and a temperature estimate and the resultant of the parameter estimation process representing an estimate parameter of the electric machine. The parameter estimation includes a method for estimating a temperature of the electric machine comprising: the temperature sensor operatively connected to and transmitting a temperature signal corresponding to a measured temperature to a controller, which executes the temperature estimation process responsive to a temperature signal from the temperature sensor.
Owner:GM GLOBAL TECH OPERATIONS LLC +1

An open-loop signal detection method and device for an all-fiber-optic current transformer

The invention discloses an all-fiber current transformer open loop signal detection method which comprises the following steps: employing an asymmetric square wave with a period of 2t and an amplitude of Vpi/2 as a modulation signal, carrying out phase modulation on an optical signal, wherein the t is a transit time of the all-fiber current transformer; after the optical signal after phase modulation is subjected to interference, converting the optical signal into an electric signal; subjecting the electric signal to a sampling treatment; in a period 2t, calculating difference between sampling sum of electric signal positive half cycle and sampling sum of electric signal negative half cycle, defining a difference result as S1, defining sampling sum of the electric signal as S2, dividing S1 by S2, and defining a divide resultant as an open loop signal detection result of the all-fiber current transformer. An embodiment of the invention also discloses an all-fiber current transformer open loop detection apparatus. Since the asymmetric square wave is employed as a modulation signal, in a demodulation process, factors related to light source power and circuit gain in an interference output result are eliminated through a specific algorithm, thus the open loop signal detection result is only related to Faraday phase shift, and accuracy of a measuring result is raised.
Owner:BEIHANG UNIV

High tower tube bending degree detection method based on three-dimensional laser scanning

The invention belongs to the technical field of building deformation measurement and particularly relates to a high tower tube bending degree detection method based on three-dimensional laser scanning. The method comprises the steps of (1) arranging an instrument through retention points which are symmetrically arranged around a tower tube as a center, and obtaining point cloud data of a tower tube body, (2) constructing a tube body TIN model, selecting tower tube cross sections, and carrying out fitting of a tower tube central axis, (3) randomly selecting n points or selecting n points with a set interval along a counter-clockwise (or clockwise) direction at the edge perimeters of the cross sections and carrying out reduction of barycentric coordinates of the tower tube cross sections, and (4) calculating a tower tube bending displacement component, a bending displacement resultant and a bending average curvature according to an adjacent cross section through the obtained barycentric coordinates of the tower tube cross sections. According to the method, the disadvantages of difficult field operations, difficult precision control, time and labor consumption, poor accuracy of target data and a large data limitation in the traditional detection of a high tower tube bending degree are solved, the high tower tube bending degree detection can be rapidly and precisely realized, and the method has important practical significance for similar engineering detection and monitoring.
Owner:POWERCHINA XIBEI ENG

Device and method for measuring DC resultant field

A measurement device of DC combined field consists of at least one down-level computer unit, up-level computer unit and PC computer. It is featured as realizing communication separately with up-level computer unit by each set of down-level computer unit; connecting monolithic computer of up-level computer to PC computer; forming said down-level computer unit by combined field transducer, signal processing-circuit, monolithic computer, communication module, A / D chip and power support module.
Owner:STATE GRID ELECTRIC POWER RES INST

Method and system for manipulating and telescoping a hash function

A method and system for providing a hash and a complement of the hash for an item in a computer system are disclosed. The method and system include providing a plurality of components from the item. The plurality of components include a first component and a last component. Each of the plurality of components includes a particular number of bits. The method and system also include cascading the plurality of components through at least one XOR to provide a plurality of resultants. The plurality of resultants includes a first resultant and a final resultant. The final resultant includes only the last component. The first resultant includes an XOR of the first component and remaining cascaded components of the plurality of components. The method and system also include applying an invertible hash function and an invertible hash function complement to at least the first resultant to provide the hash. The complement of the hash includes the plurality of resultants except the first resultant. In another aspect, the method and system include applying the invertible hash function and its complement to at least the first component of the plurality of components, before the plurality of components are cascaded through the at least one XOR. In this aspect, the hash includes the first resultant. The complement of the hash includes the plurality of resultants except the first resultant.
Owner:IBM CORP
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